What is 281.4/10*0?

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Gabrielle's age is two times mikhail's age. the sum of their ages is 84. what is mikhail's age?

Olga bought a new skirt that cost $20. sales tax is 5%. how much did olga pay, including sales tax? 7.

5, 6, 10 question: a. determine whether the side lengths form a triangle. (explain your reasoning) b. if it is a triangle, determine whether it is a right, acute, or obtuse triangle. (show your work)